Liocarcinus depurator ( Linnaeus, 1758 )

Guerao, Guillermo, Abelló, Pere & Santos, Antonina Dos, 2006, Morphological variability of the megalopa of Liocarcinus depurator (Brachyura: Portunidae) in Mediterranean and Atlantic populations, Journal of Natural History 40 (32 - 34), pp. 1851-1866 : 1853-1857

publication ID	https://doi.org/ 10.1080/00222930601046584
persistent identifier	https://treatment.plazi.org/id/03FA0525-FFCD-FF90-FE6D-FB11FB22FBCF
treatment provided by	Felipe
scientific name	Liocarcinus depurator ( Linnaeus, 1758 )
status

Treatment

Liocarcinus depurator ( Linnaeus, 1758) View in CoL

( Figures 1–9 View Figure 1 View Figure 2 View Figure 3 View Figure 4 View Figure 5 View Figure 6 View Figure 7 View Figure 8 View Figure 9 ) Lebour 1928, p 515, Plate VI, Figure 1 View Figure 1 ; Ingle 1985, p 246; Ingle 1992, p 212,

Figures 1.28d, 1.31g View Figure 1 , 2.23a–g, l View Figure 2 .

Description of megalopa

Size. CL53.02¡0.10 mm; CW52.04¡0.12 mm (n 530).

Carapace ( Figure 1A, B View Figure 1 ). Longer than broad, without spines. Rostrum horizontal and prominent, margin of the frontal region slightly raised, medial furrow shallow; a pair of prominent protogastric carinae. Posterior margin straight.

Antennule ( Figure 1C View Figure 1 ). Peduncle three-segmented, with 4, 3, 2 setae, respectively. Endopod two-segmented with two subterminal and four terminal setae in distal segment.

Exopod four-segmented, with 0, 10–12, 8–9 and 5 aesthetascs, respectively, and 0, 0, 2, 2 (one subterminal and one terminal) simple setae.

Antenna ( Figure 2A View Figure 2 ). Peduncle three-segmented, with 2–4, 2, 2 setae, respectively. Flagellum seven- or eight-segmented (frequently segments 2 and 3 not completely segmented), with 0, (0), 4, 0–1, 4–5, 1, 4, 4–5 setae, respectively (usually 0, (0), 4, 0, 5, 1, 4, 5).

Mandible ( Figure 2B View Figure 2 ). Palp two-segmented, with 11–13 (usually 12) sparsely plumose setae on distal segment.

Maxillule ( Figure 2C View Figure 2 ). Coxal endite with 15–16 setae (seven cuspidate and eight to nine plumodenticulate). Basial endite with 28–31 setae (25–26 setae along posterior margin and three to five setae on inner lateral margin). Endopod unsegmented with four to six setae.

Maxilla ( Figure 3 View Figure 3 ). Coxal endite bilobed, with 7–8+4–5 setae. Basial endite bilobed, with 10–11+11–12 setae. Endopod unsegmented, with two to five plumose setae on its outer lateral margin. Exopod (scaphognathite) with 59–65 marginal plumose setae (mean value 61.9¡2.26) and four to six lateral setae.

First maxilliped ( Figure 4 View Figure 4 ). Epipod with 16–19 long simple setae. Coxal endite with 16–19 setae. Basial endite with 37–39 setae. Endopod unsegmented with one to two proximal plumose and four to five distal simple setae. Exopod three-segmented, proximal segment with five to seven distal plumose setae, distal segment with five to six long plumose terminal setae.

Second maxilliped ( Figure 5 View Figure 5 ). Epipod with one long simple seta. Coxa and basis not differentiated, with four setae. Endopod four-segmented with one to four simple setae on proximal segment, one to two setae on the second, seven to eight plumodenticulate setae on third segment, nine (six cuspidate and three plumodenticulate) setae on distal segment. Exopod three-segmented, proximal segment with two to three short and thick setae, and distal segment with six to seven terminal plumose setae.

Third maxilliped ( Figure 6 View Figure 6 ). Epipod elongated with 10–12 long setae. Coxa and basis not differentiated with 20–25 setae. Endopod five-segmented, ischium inner margin with three or four teeth (crista dentata) and 28–30 setae; merus with 13–17 setae; carpus with 9–11 setae; propodus with 12–14 serrate setae; dactylus with 10–11 serrate setae, respectively. Exopod three-segmented, proximal segment with one or two setae, and distal segment with five to seven terminal plumose setae.

Pereiopods ( Figure 7A–G View Figure 7 ). All segments well differentiated. Pereiopod 1 (chelipeds) with one ischial spine; pereiopods 2–4 with one coxal spine. Dactyls of pereiopods 2–4 with 7, 7– 8, 6–7 small spines on the inner margin. Dactyl of pereiopod 5 with three long subterminal setae.

Sternum ( Figure 7H View Figure 7 ). Maxillipeds and cheliped sternites fused with 4–6+2+6–8 setae plus one medial small process. Sternites of pereiopods 2–4 with 1–2, 1, 1 setae.

Abdomen ( Figure 8A, B View Figure 8 ). Six somites, broader than long, with well-developed tergites. Setation on somites as figured.

Pleopods ( Figure 8C, D View Figure 8 ). Well developed and biramous; endopod unsegmented, inner margin with 3, 3, 4, 4 subterminal coupling hooks, respectively. Exopod unsegmented with 20–22, 22, 18–20, 17–18 long marginal natatory setae, respectively.

Uropods ( Figure 9F, G View Figure 9 ). Uropods two-segmented, proximal segment (protopod) with zero to two (usually one) plumose setae, and distal segment (exopod) with 10–11 long marginal plumose setae, respectively.

Telson ( Figure 9A–E View Figure 9 ). Broader than long; dorsal surface with four to six simple setae (see Figure 9A–E View Figure 9 ), and a pair of setae on lateral margin, and a pair of setae on ventral surface.